.base-info {
  margin: 18px 0 20px;
  padding: 35px 31px 40px 29px;
  min-height: 300px;
  background: #fff;
}

.media-domain {
  margin-right: 25px;
}
.media-img {
  display: block;
  margin-bottom: 21px;
  width: 493px;
  min-height: 493px;
  background: rgba(0, 0, 0, .6);
}

.course-domain {
  width: 602px;
  font-size: 14px;
}
.course-domain .title {
  margin: -5px 0 8px;
  line-height: 34px;
  font-size: 24px;
  font-weight: 700;
}
.course-domain .subtitle{
  margin-top: 0;
  margin-bottom: 13px;
  min-height: 14px;
  line-height: 14px;
  font-size: 14px;
  color: #797a7d;
}
.course-domain .card-sale {
  margin-bottom: 20px;
  padding-bottom: 20px;
  min-height: 75px;
  background: #f5f5f5;
}
.course-domain .pay-block .button {
  display: inline-block;
  padding: 0 15px;
  height: 42px;
  line-height: 42px;
  border-radius: 4px;
  font-size: 20px;
  cursor: pointer;
  text-align: center;
  vertical-align: top;
}
.course-domain .pay-block .button-kefu {
  box-sizing: border-box;
  width: 118px;
  border: 1px solid #f26255;
  color: #f26255;
}

.button-buy {
  margin-right: 16px;
  width: 148px;
  background: linear-gradient(94deg, #ec6a6e, #f3886d);
  box-shadow: 0 3px 5px 0 rgba(0, 0, 0, .1);
  color: #fff;
  border-radius: 4px;
  font-size: 20px;
  cursor: pointer;
  text-align: center;
}
.button-buy:hover {
  background: linear-gradient(94deg,#f04d3e,#ff9b74);
}

.price-block .label {
  margin-top: 18px;
}
.price-block {
  padding: 15px 15px 0 12px;
  height: 40px;
}
.price-block .price-new {
  display: inline-block;
  position: relative;
  margin-top: -3px;
  margin-right: 8px;
  padding-left: 12px;
  font-size: 36px;
  color: #f54030;
  vertical-align: top;
  line-height: 1.5;
}
.price-block .price-new:before {
  content: "¥";
  margin-right: 4px;
  font-size: 24px;
}

.hot {
  float: right;
  margin-top: 18px;
  color: #9598a2;
  font-size: 12px;
}

.section-block {
  display: -webkit-box;
}
.section-detail {
  box-sizing: content-box;
  float: left;
  padding: 0 15px 75px;
  width: 850px;
  background: #fff;
}
.section-detail .tab-group {
  z-index: 2;
  height: 64px;
  line-height: 64px;
  background: #fff;
  border-bottom: 1px solid #e1e4e9;
}
.section-detail .tab-group .tab {
  width: 850px;
  display: flex;
}
.section-detail .tab-group .item {
  position: relative;
  flex: 1;
  height: 64px;
  font-size: 16px;
  text-align: center;
  cursor: pointer;
}
.section-detail .tab-group .item.current {
  color: #04addb;
}
.section-detail .tab-group .item.current:before {
  content: " ";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 3px;
  background: #04addb;
  border-radius: 3px;
  overflow: hidden;
}

.category-name {
  position: relative;
  margin: 40px 0 37px;
  height: 18px;
  line-height: 18px;
  font-size: 18px;
  text-indent: 37px;
}
.category-name:before {
  content: " ";
  position: absolute;
  top: 1px;
  left: 20px;
  width: 4px;
  height: 16px;
  background: #04addb;
  border-radius: 3px;
  overflow: hidden;
}

.sub-title {
  position: relative;
  margin-bottom: 8px;
  padding-left: 16px;
  height: 66px;
  line-height: 66px;
  background: #f8f9fb;
  border-radius: 8px 8px 0 0;
  font-size: 16px;
  cursor: pointer;
}

.label {
  display: inline-block;
  margin-right: 21px;
  width: 56px;
  text-align: justify;
  text-align-last: justify;
  vertical-align: top;
  color: #797a7d;
}

.classify-block {
  position: relative;
  margin: 12px 15px 30px 12px;
  line-height: 26px;
}
.classify-block .classify-group {
  width: 445px;
  border: 1px solid transparent;
  background: #fff;
}
.classify-block .classify-group li {
  position: relative;
  display: inline-block;
  margin: 0 12px 16px 0;
  padding: 0 12px;
  min-width: 84px;
  height: 26px;
  line-height: 24px;
  border: 1px solid #dfdfdf;
  border-radius: 3px;
  color: #525253;
  font-size: 14px;
  text-align: center;
  cursor: pointer;
  vertical-align: top;
}
.classify-block .classify-group li.current {
  color: #04addb;
  border-color: #04addb;
}

.group-list.active .l-empty, .group-list.active .lesson-list {
  display: block;
}
.group-list .lesson-list {
  position: relative;
  padding: 0;
}
.lesson-list .lesson {
  position: relative;
  height: 68px;
  line-height: 68px;
  font-size: 14px;
  text-indent: 42px;
  cursor: pointer;
}
.lesson-list .lesson:hover {
  background: #e9f3ff;
}
.lesson-list .lesson .lesson-inner {
  box-sizing: border-box;
  position: relative;
  margin-left: 16px;
  padding-top: 13px;
  line-height: 21px;
  text-indent: 0;
}
.lesson-list .lesson .lesson-inner .name {
  height: 24px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lesson-list .lesson .lesson-inner .text {
  margin-top: 3px;
  color: #9598a2;
  font-size: 12px;
}

.teacher-list {
  margin-top: 28px;
}
.teacher-list .teacher-item .face {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 1px solid #f0f0f0;
  border-radius: 50%;
  vertical-align: middle;
}
.teacher-list .teacher-item .teacher-name {
  display: inline-block;
  margin-left: 8px;
  font-size: 16px;
  color: #9598a2;
  vertical-align: middle;
}
.teacher-list .teacher-item .teacher-description {
  margin: 15px 0 28px 52px;
  line-height: 24px;
  font-size: 14px;
  color: #686a71;
}

.section-more {
  margin-left: 20px;
  float: right;
  width: 280px;
}

.question-domain {
  margin-bottom: 13px;
  padding: 0 20px 13px;
  background: #fff;
}
.question-domain .domain-title {
  box-sizing: content-box;
  padding: 23px 0 16px;
  height: 16px;
  line-height: 16px;
  font-size: 16px;
  border-bottom: 1px solid #efeff0;
  overflow: hidden;
}
.question-domain .q-list {
  margin-top: 15px;
  list-style: none;
}
.question-domain .q-list .item {
  height: 30px;
  overflow: hidden;
}
.question-domain .q-list .item.on {
  height: auto;
  overflow: auto;
}
.question-domain .q-list .title {
  position: relative;
  margin-top: 5px;
  margin-bottom: 12px;
  height: 16px;
  line-height: 16px;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.question-domain .q-list .body {
  margin-bottom: 20px;
  padding: 18px 20px;
  background: #f9f9f9;
  border-radius: 5px;
  height: auto;
  font-size: 12px;
  color: #9598a2;
}

.course .tab{
  margin: 5px 0 0 35px;
  color: #686a71;
}
.course .tab span.current {
  color: #04addb;
  border: 1px solid #04addb;
  background: rgba(29,119,253,.06);
}
.course .tab span{
  box-sizing: border-box;
  display: inline-block;
  margin: 15px 20px 0 0;
  padding: 0 15px;
  height: 30px;
  line-height: 30px;
  background: #f5f7fc;
  border-radius: 3px;
  font-size: 14px;
  vertical-align: middle;
  cursor: pointer;
  color: #686a71;
  width: fit-content;
  text-align: center;
}
